This is the first prospective randomized double-blind placebo-controlled study to investigate the effect of a GLP-1 analog, specifically liraglutide, on blood glucose levels and variability in subjects with type 1 diabetes treated with insulin. Liraglutide is the preferred GLP-1 analog for this study because the pharmacokinetics and pharmacodynamics of the drug are consistent with a sustained duration of action. The current gold standard for management of type 1 diabetes is based on insulin replacement with novel analogs with specified pharmacodynamic profiles or with unique insulin delivery systems (insulin pump therapy). No other adjuvant therapy has demonstrated sustained benefit in this population. This study will also investigate the effect of liraglutide on suppression of glucagon secretion during meal challenges. This is of particular importance since, in the absence of insulin secretion from the β-cell, there is no paracrine inhibition of glucagon secretion by the α-cell. Dysregulation of glucagon secretion may impact the glycemic control and overall pathogenesis in those with type 1 diabetes. The use of CGM technology in this study will allow us to determine the rapidity, consistency, and sustainability of any response to liraglutide.

Age 15-30 years - This age group is being chosen as most will have completed puberty with the accompanying physiologic phase of increased insulin resistance. In addition, this age group shows increased self-management capabilities. Extending the age up to 30 years will allow us to include young adults, since type 1 diabetes is frequently diagnosed in the late teen and early adult years. This study is not powered to detect differences in liraglutide efficacy in different age group but it may provide insight into the effectiveness in the teenage population, in whom optimal glycemic control is often a challenge.

Type 1 diabetes duration greater than 1 year to ensure that a majority of subjects are beyond the partial remission period.

Fasting C-peptide level ≤ 0.3 ng/ml.

HbA1c level equal or less than 9%

Insulin delivery by CSII - the choice is made to facilitate adherence to study drug and also to enable us have a homogeneous group to analyze without having to analyze the data for the covariants of CSII vs. multiple daily injection therapy.

Subjects willing to wear a CGM sensor and perform home blood glucose monitoring four times daily and with symptoms of hypoglycemia.

History of severe hypoglycemia (seizure, loss of consciousness) within 6 months of the study

History of medullary thyroid cancer or MEN2 syndrome

Any other life-threatening cardiac or non-cardiac disease

Participation in a concurrent clinical trial or participation in a trial within 30 days preceding the study period.

Unable to give informed consent/assent.

Adolescents and adults who are considered underweight based on body mass index (BMI):

For adolescents: BMI less than the 5th percentile

For adults: BMI below 18.5

Contacts and Locations

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study.
To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.
For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01722227